# Hermes Browser Extension

> Connect Firefox page context to Hermes Agent. Ask questions about what you’re viewing, use Local, Hermes Cloud, or Remote gateway modes, and review drafts in a browser sidebar.

Canonical page: [https://chrome-stats.com/d/hermes-browser-extension](https://chrome-stats.com/d/hermes-browser-extension)

## Overview

- **ID:** `hermes-browser-extension`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Jon Komet
- **Category:** web-development,privacy-security,social-communication
- **Daily users:** 25
- **Weekly downloads:** 21
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 0.3.2
- **Last updated:** 2026-09-07
- **First published:** 2026-08-18
- **Size:** 8.09 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/hermes-browser-extension/)
- **Website:** [https://github.com/abundantbeing/hermes-browser-extension/issues](https://github.com/abundantbeing/hermes-browser-extension/issues)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/hermes-browser-extension/privacy/](https://addons.mozilla.org/firefox/addon/hermes-browser-extension/privacy/)

## Description

Hermes Browser Extension connects Firefox to the Hermes Agent runtime you configure.

Use the browser sidebar to capture bounded context from the current page, selected text, open tabs, metadata, headings, links, forms, and buttons, then ask Hermes about what you are viewing.

Choose a Local gateway, Hermes Cloud, or Remote gateway. The extension supports Hermes sessions, model and runtime controls, streaming responses, attachments, voice input when available, generated media, appearance themes, and diagnostics.

Hermes Assist provides site-aware drafting for supported writing surfaces. It can prepare replies, posts, or messages for review. It does not click Send, Post, or Submit, navigate pages, make purchases, or operate the browser autonomously.

The extension includes no analytics, advertising, tracking pixels, or third-party reporting SDKs. Browser context is sent only to the Hermes runtime you configure, and Chat only mode disables page context for a turn.

Requires Firefox 142 or later. Review the privacy policy before installation.

Hermes Agent is an open-source project by Nous Research. Hermes Browser Extension is a community extension by Jon Komet that connects through a local gateway, Hermes Cloud agent tab, or self-hosted remote gateway. It is designed to live at the edge of the ecosystem without adding core tool-schema footprint.

Useful links:
<ul><li>Hermes docs: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/93032da6456a6e69802df5fb7c4eb4b478b57b8a271e5bfec7fcf9a6f3dbe8d9/https%3A//hermes-agent.nousresearch.com/docs" rel="nofollow">https://hermes-agent.nousresearch.com/docs</a></li><li>Hermes API server docs: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/388fbbc792d6506ae8dc56c48bef8034a65c9bfbd9299d8a0fffeeefee8b94eb/https%3A//hermes-agent.nousresearch.com/docs/user-guide/features/api-server" rel="nofollow">https://hermes-agent.nousresearch.com/docs/user-guide/features/api-server</a></li><li>Hermes upstream repo: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/c0fdf50fc666a3c69a23cd9b0eb4f726ca4dedd2185d68675293455a0db80f86/https%3A//github.com/NousResearch/hermes-agent" rel="nofollow">https://github.com/NousResearch/hermes-agent</a></li></ul>

## Rankings

- #22,065 — Overall
- #66 — gateway
- #128 — browser extension

## Permissions and access

### Permissions

- `activeTab`
- `alarms`
- `contextMenus`
- `downloads`
- `scripting`
- `storage`
- `tabs`

### Host permissions

- `http://127.0.0.1/*`
- `http://localhost/*`
- `http://*/*`
- `https://*/*`
- `file:///*`

### Content script matches

- `*`
- ``

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/hermes-browser-extension)